From 2015-2018 I was Chief Scientist at Insidesales.com where we apply ML to improve the effectiveness of B2B sales teams. From 2014-15 I was CTO of C9 (acquired by Insidesales in 2015) where we worked on modeling sales processes (see here and here).

​In 2012, I built Featurestream.io (see here, here and here), a service for building ML models on streaming data using a variation on streaming Random Forests on Spark streaming.

From 2009-12, I was founder/CTO at Acunu. We built an engine for analytics on streaming data using Cassandra and sketching techniques. We also developed the Stratified B-tree, a write-optimized versioned indexing algorithm (see here, here, here).